/*
 * Flashlib - QB9 common Flash library
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package com.qb9.flashlib.utils
{
	import com.qb9.flashlib.math.QMath;
	
	// TODO: Move coordinate functions from DisplayUtil to here
	public final class CoordUtil
	{
		public static function fromASRot( deg:Number ) : Number
		{
			return Math.abs(deg - 270);
		}
		
		public static function toASRot( deg:Number ) : Number
		{
			return (deg * -1) + 270;
		}
		
		public static function radAngle( start:Object, end:Object  ) : Number
		{
			var dx:Number = end.x - start.x;
			var dy:Number = end.y - start.y;
			
			return Math.atan2(-dy, dx);
		}
		
		public static function angle( start:Object, end:Object  ) : Number
		{
			return QMath.rad2deg(radAngle(start,end));
		}
		
		public static function distance2( start:Object, end:Object  ) : Number
		{
			var dx:Number = end.x - start.x;
			var dy:Number = end.y - start.y;
			
			return dx*dx + dy*dy;
		}
		
		public static function distance( start:Object, end:Object  ) : Number
		{
			return Math.sqrt(distance2(start,end));
		}
	}
}